I have come to this late. I have solved all the lights (thanks Sousa), but please might I have hints please for:
16A Titivate to run for Scotland in park (5) ? R I N ?
21D Frank's superlative after holiday (9) S ? N ? E ? ? ? T
25D Grand Aussie native twice seen in palm tree (8, hyphened) ? R ? O ? ? ? O